Separation of cobalt and nickel using a thermomorphic ionic-liquid-based aqueous biphasic system.


A [P44414][Cl]-NaCl-H2O ionic liquid-based aqueous biphasic system shows promising results for the separation of cobalt(II) and nickel(II) by homogeneous liquid-liquid extraction. The extracting phase consists of a hydrophilic ionic liquid that is salted-out by sodium chloride, indicating that there is no need for using hydrophobic ionic liquids. 
DOI: 10.1039/c5cc06595j



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